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  #1  
Old 02-19-2019, 08:59 AM
krhea krhea is offline
 
Join Date: Nov 2011
Location: Peck, Kansas
Posts: 165
Default Control stick wiring

I am upgrading my control stick to tosten Cs-8 and am confused about the digital input output wiring. I am adding the MGL n16-V16 radio and a CS-8 stick grip. I built a small schematic at this link:

https://www.dropbox.com/s/bp70rxmhbd...ck%20.pdf?dl=0

I just cannot wrap my head around the ptt going to audio ground at the radio and the other ptt switchs grounding to power ground. Seems like i need to take the cs-8 apart and add another wire for the ptt trigger?

Thanks

Keith Rhea.
RV7
2019 dues paid.
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  #2  
Old 02-19-2019, 09:44 AM
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jeffw@sc47 jeffw@sc47 is offline
 
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Location: Simpsonville, SC (SC47)
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Schematic looks like you should be using V16 pins 15 and 17, and not 14 and 17. Not certain re pin 17 Radio Recall?
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  #3  
Old 02-19-2019, 10:03 AM
krhea krhea is offline
 
Join Date: Nov 2011
Location: Peck, Kansas
Posts: 165
Default MGL control stick wiring

I added another diagram. where i am interfacing a CS-8 stick grip functions to an MGL Explorer lite with IEFIS Extender and N16 & V16 Radios.

Here is the link:https://www.dropbox.com/s/t67ktntk9x...16v16.pdf?dl=0



Keith Rhea
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2019 dues paid
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  #4  
Old 02-19-2019, 10:28 AM
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Mike S Mike S is online now
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Location: Dayton Airpark, NV A34
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Quote:
Originally Posted by krhea View Post

I just cannot wrap my head around the ptt going to audio ground at the radio and the other ptt switches grounding to power ground.
You only have one switch that is PTT-------Push To Talk (transmit), and IIRC, that is the trigger. It has a separate ground wire.

The other switches are for controlling various functions that you pick. These are all tied to a single ground inside the switch. Some can be used for things like radio freq flip/flop, or A/P disconnect, or XPNDR ident------these only require a grounding of a lead to activate. For things like trim, you use the grip wiring to activate a relay.

https://tostenmanufacturing.com/wp-c...eck_wiring.pdf
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Last edited by Mike S : 02-19-2019 at 10:31 AM.
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  #5  
Old 02-19-2019, 11:16 AM
rv7charlie rv7charlie is offline
 
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Location: Pocahontas MS
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Simple answer: don't worry about it. The PTT just takes a sense line to ground potential, and any ground will do, for that purpose. The radio itself is almost certainly grounded to the instrument panel, which is grounded to the airframe in RVs. (You can verify on your radio by checking between the radio's ground pin and the radio chassis with an ohm meter. Any reading under a few ohms means that it's tied to the chassis.)

The critical grounding issues are related to high power noise makers interfering with extremely low level signals, like audio. There's no real 'signal' involved with the PTT; it either has a DC voltage potential on that pin in the radio (no active PTT), or no DC on the pin (grounded by the PTT). Noise is not an issue here.

Charlie
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  #6  
Old 02-20-2019, 12:34 PM
krw5927 krw5927 is offline
 
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Quote:
Originally Posted by rv7charlie View Post
Simple answer: don't worry about it. The PTT just takes a sense line to ground potential, and any ground will do, for that purpose.
Keith, what Charlie says here is exactly what I did. Been working great and noise-free for hundreds of hours.
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  #7  
Old 02-21-2019, 02:02 PM
krhea krhea is offline
 
Join Date: Nov 2011
Location: Peck, Kansas
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I finally figured it out and tested it seems to work ok. Had to add a 12vDC to the input through a 4.7Kohm resistor.

Schematic at:https://www.dropbox.com/s/8v19mbvyfd...witch.pdf?dl=0

Thanks

Keith Rhea
RV7
2019 Dues paid
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